From 04e271786fa45b9d618e508571961921429fe4a5 Mon Sep 17 00:00:00 2001 From: Wang Shilong Date: Mon, 7 Oct 2013 15:21:38 +0800 Subject: [PATCH] Btrfs-progs: introduces '-p' option to print the ID of the parent qgroups This patch introduces '-p' option to print the ID of the parent qgroups. You may use it like: btrfs qgroup show -p For Example: qgroupid(2/0) / \ / \ / \ qgroupid(1/0) qgroupid(1/1) \ / \ / qgroupid(0/1) If we use the command: btrfs qgroup show -p The result will output 0/1 -- -- 1/0,1/1 1/0 -- -- 2/0 1/1 -- -- 2/0 2/0 -- -- -- Signed-off-by: Wang Shilong Signed-off-by: Miao Xie Signed-off-by: David Sterba Signed-off-by: Chris Mason --- cmds-qgroup.c | 23 ++++++++++++++++++++--- qgroup.c | 22 ++++++++++++++++++++++ qgroup.h | 1 + 3 files changed, 43 insertions(+), 3 deletions(-) diff --git a/cmds-qgroup.c b/cmds-qgroup.c index d3c699f..96098c1 100644 --- a/cmds-qgroup.c +++ b/cmds-qgroup.c @@ -202,22 +202,39 @@ static int cmd_qgroup_destroy(int argc, char **argv) } static const char * const cmd_qgroup_show_usage[] = { - "btrfs qgroup show ", + "btrfs qgroup show -p ", "Show all subvolume quota groups.", + "-p print parent qgroup id", NULL }; static int cmd_qgroup_show(int argc, char **argv) { + char *path; int ret = 0; int fd; int e; - char *path = argv[1]; DIR *dirstream = NULL; + int c; - if (check_argc_exact(argc, 2)) + optind = 1; + while (1) { + c = getopt(argc, argv, "p"); + if (c < 0) + break; + switch (c) { + case 'p': + btrfs_qgroup_setup_print_column( + BTRFS_QGROUP_PARENT); + break; + default: + usage(cmd_qgroup_show_usage); + } + } + if (check_argc_exact(argc - optind, 1)) usage(cmd_qgroup_show_usage); + path = argv[optind]; fd = open_file_or_dir(path, &dirstream); if (fd < 0) { fprintf(stderr, "ERROR: can't access '%s'\n", path); diff --git a/qgroup.c b/qgroup.c index bd9658e..0dbf28c 100644 --- a/qgroup.c +++ b/qgroup.c @@ -88,6 +88,11 @@ struct { .need_print = 1, }, { + .name = "parent", + .column_name = "Parent", + .need_print = 0, + }, + { .name = NULL, .column_name = NULL, .need_print = 0, @@ -108,6 +113,20 @@ void btrfs_qgroup_setup_print_column(enum btrfs_qgroup_column_enum column) btrfs_qgroup_columns[i].need_print = 1; } +static void print_parent_column(struct btrfs_qgroup *qgroup) +{ + struct btrfs_qgroup_list *list = NULL; + + list_for_each_entry(list, &qgroup->qgroups, next_qgroup) { + printf("%llu/%llu", (list->qgroup)->qgroupid >> 48, + ((1ll << 48) - 1) & (list->qgroup)->qgroupid); + if (!list_is_last(&list->next_qgroup, &qgroup->qgroups)) + printf(","); + } + if (list_empty(&qgroup->qgroups)) + printf("---"); +} + static void print_qgroup_column(struct btrfs_qgroup *qgroup, enum btrfs_qgroup_column_enum column) { @@ -125,6 +144,9 @@ static void print_qgroup_column(struct btrfs_qgroup *qgroup, case BTRFS_QGROUP_EXCL: printf("%lld", qgroup->excl); break; + case BTRFS_QGROUP_PARENT: + print_parent_column(qgroup); + break; default: break; } diff --git a/qgroup.h b/qgroup.h index 8b34cd7..cefdfe1 100644 --- a/qgroup.h +++ b/qgroup.h @@ -26,6 +26,7 @@ enum btrfs_qgroup_column_enum { BTRFS_QGROUP_QGROUPID, BTRFS_QGROUP_RFER, BTRFS_QGROUP_EXCL, + BTRFS_QGROUP_PARENT, BTRFS_QGROUP_ALL, }; -- 2.7.4